Sectional pile



E. WAT-u' 1,798,858

SECTIONAL PILE Filed July l4, 1928 3 Sheets-Sheet 1 wuc-Moz 13- WW LJ[konne-13.0

W, GJVV Mam.,

March 31, 1931. E. D. wATT SECTIONAL PILE Filed July 14, 1928 3Sheets-Sheet 2 Mac 31, 1931. E, D, WAT-r lfigsg SECTIONAL PILE FiledJuly 14, 1928 3 Sheets-Sheet 5 arranged at a suitable distance from theend and held temporarily in position (by any suitable means, not shown)`to make the annular space 13 between the sleeve and the pilesubstantially uniform in radial width. If, as is usual, the pile has,not been driven and iswlying on itsi side, both ends of the sleeve'areclosed by any convenient means, as for example by wrapping Canvas orsacking, not shown, around the ends of the sleeve. The concrete is thenpoured in through the opening 14. The sleeve is thus solidly backed withconcrete, which is in turn backed by the wood pile, so that the sleeve.is practically incapable of distortion or. deformation by stresses andpressures encountered in sub.-

i sequent driving, and at the same time the sleeve reinforces theconcrete backing againstv cracking or shattering.

The wood section is' driven to the desired depth, leavlng the couplingcollar at a suitable position above the ground, as-in Fig. 3.

for example, and the corrugated shell 15 for the upper section isVscrewed down on the collar. This shell may be in one piece, or inV twoor more Sections screwed one into the other, the shell shown beingcomposed of two such Sections. It will be observed that the collarprovides a shoulder 16'at its top, thus making a tenon 17 of theprotruding end of' the wood pile. If desired `the lower portion of thesteel sleeve may have a slight flare (not shown) to give a'tighter fitwith the shell, vbut ordinarily it is not necessary since the shell andthe sleeve can easily be made with a close enough fit, or, if not, thesleeve may be coated with .any suitable composition to make the'jointsuificiently waterti ght if the pile is to be sunkin very' wet soil.Theassembly shown in Fig'. '3 isnow driven,

using a suitable coreV in the shell, as is customary' As thedrivingproceeds the collar plows a hole for Vthe shell above, so thatthe latter is not compelledgto displace the soil and has to wit'hst-andonly the driving friction resulting from inward movement `of the soilafter thecollar has passed. Hencev the' liability of distortion of theshell is greatly. decreased, to suchV as yextent that` in 'upper end ortenon of the wood'pile and b'ears ony-the top of'the latter andlalso onthe shoulder 16. Ifunder special conditions greater strength at thejoint is desired ,the wood pile may be provided witha tenon of the usualkind, 'asV in Fig. V4,"fo'r example,

which shows a tenon 18 formed by turning'` by va conneet-ing sleeve 28.

screwed down on the collar 12, laving itsend,

well abovethe'collar, andintozthesleeve is inserted a tool having a head20, which may be corrugated and which is hollow to accommodate theprotruding end or tenon of the pile and .is Acarried by arms 21depending from a handle or actuating member 22. The toolv is pushedlatera'lly, thereby straightening up thev sleeve, as indicated, sucheffect being accompanied by compression or' crimping of the screw-threadcorrugations on oneslde of' the coupling' sleeve 19 and expansion ofthesame on the'other.

itted to the sleeve.

`In the construction shown in Fi'g. '6 the corrugated reinforcingsleeve, as shown at 22a, is partially embedded in the concrete collar23, which itselfextends above the top of the' wood pile toV form asocket and is provided with additional relnforcement, as rods 24 andrings 25. Theshel'l15 for the upper'sectionv is 'screwed to'theVprotruding end of the sleeve;

In vdriving the shell: the core: (notV shown) fits down into theconcrete-collar so ,as to drive on top of' the Wood pile. When the,

upper section is cast the concrete fillsthe.

'Socket in the' collar., foring a tenon, and:

may, of'conrse, have suitable .reinforcingv members, not shown,extending into the socket to give increased beamV strength at i The toolcan now be., removed and the shell for 'the'vupper section have suitableholes-.or openings, not shown,

to bondthe-concrete on the inside and' outside together, 1f desired gThe mven'tlon `mayalso beused for connecting twowood sections together,asin iFig-' forV example,` in which the. abutt'ing ends. of thesections,. dersignated 26, 27, are` providedwith collars and the bond isformed I-Ielical, orv screw-thread, corrugations are' preferred but theymay be non-.helical, lin which case .the corrugated upper shell` may besplit at its .lower end to admit the col'lar on the lower section, afterwhich'the split port'ion' can be'boun'd with wine to hold it firmly on`the collar. rrIhis construction is illulstrated -in I'lig.` 8,''in7which theshel'l29` i the wood is split at 30 and is tied on the collar,on the wood pile 10, by wires 31.

In some cases I may dispense With the sheet metal sleeve and provide thecollar With internal reinforcement, as in Fig. 9 for example. In thisfigure the collar, designated by 32, is cast on the Wood pile 10 in asuitable form or mold, preferably corrugated, and is provided withlongitudinal reinforcing barS 33 and reinforcing rings 34.

If the collar is not corrugated I prefer to give it a downward taper inorder to afl'ord more secure connection with the Shell above. T hns inFig. 10 the collar 36, which may have its reinforcement on the outsidein the form of a sheet metal sleeve, or inside as in Fig. 6, is tapereddownwardly and the lower end of the shell 37 is tapered to fit, with itsedge bent under the collar. In this case the Wood pile, shown at 10, isshelled up before itl is driven, the shell being drawn up over it. Theshell, or at least the upper portion of it, may be corrugated ifdesired.

It is to be understood that the invention is not limited to the specificconstructions herein described hut may be carried out in other wayswithout departure from its spirit.

I claim` 1. A composite pile comprising a wood pile provided at its headend With a collar comprising a metal sleeve and a hacking of concretebetween the sleeve and the pile to reinforce the same against lateralpressures, a sheet metal pile shell locked to the collar on pile, and a.filling of concrete in the shell.

2. A composite pile comprising a lower section of wood having at itsupper encl a collar comprising a sheet metal sleeve formed Withscrew-threaded corrugations, and a filling of concrete cast between thesleeve and wood section, the concrete engaging the section to preventlongitudinal displacement of the collar; and an upper section comprisinga Sheet metal pile shell screw-threaded on said collar, and a filling ofconcrete in the shell.

3. A composite pile comprising a lower wood section having at its upperend a caston reinforced concrete collar provided with externalscrew-thread corrugations, a connecting sleeve having like corrugationsScrewed to the collar, a pile shell for the upper section having likecorrugations screwed to the connecting sleeve, and a filling of concretein the shell and bearing on the lower wood section. t i

4. A composite pile comprising a lower section of wood having at itsupper end and below the top, a collar comprising a helically corrugatedsheet metal sleeve and a cast-inplace filling of concrete between thesleeve and the wood, a helically corrugated sheet metal connectingsleeve screWed to the collar, a helically corrugated pile shell for theupper section screwed to the connecting sleeve, and

lower Wood section,

nal helical corrugations, screwing on the collar a connecting sleeve ofhelically corrugated sheet metal, screwingon the sleeve an upper pileshell of sheet metal having helical corrugations, and filling the shellwith concrete in bearng contact With the lower section.

7. Method of (setting composite piles, comprising arranging around thehead end of a lower pile section of wood a sheet metal sleeve providingan annular Space. between the sleeve and said pile section, filling theannular space with concrete` toV reinforce the sleeve againstdeformation by pressures or stresses encountered inthe ground,I drivingthe Wood i section, arrang'ing a pile shell above the Wood sectionandlooking the shell to the collar thereon, driving the Wood section andshell into the ground, and filling the shell with concrete.

8. Method of setting composite piles com.- prising casting on a lowerwood section at the upper end thereofa collar of reinforced concretehaving external helical corrugations, screwingon the collar a helicallycorrugated sheet metal connecting sleeve, driving the lower woodsection, screwing onthe conneoting sleeve an upperpile shell ofhelically corrugated sheet metal, driving the Wood pile farther to'carrythe pile shell into the ground, and filling the Shell with concrete inbearing contact with the lower section. i i

9. Methodof setting composite piles comprising casting on alower woodSection at the upper end thereof a collar of renforced concrete havingexternal helical corrugations, screwing on the collar a helicallycorrugated sheet metal connecting sleeve, bending the connecting sleevelaterally to setithe uppery end thereof invertical position, driving thescrewing on the con- 4 necting sleeve an upper pile shell of helicallycorrugated sheet metal, driving the Wood pile farther to carry the pileshell into the ground, and filling the shell with concrete in bearingcontact .with the lower section.

In testimony Whereof I hereto afix my signature.

ELIHU D. WATT.

